AP BIOLOGY

Detailed explanation-1: -External stimuli are changes to conditions outside of the body, or in general, information from outside the body that our senses detect. For example, our bodies respond to changes in light and temperature and to sources of danger.

Detailed explanation-2: -Answer and Explanation: An external stimulus is a stimulus that originates from outside the organism. For example, light is an external stimulus. It originates from outside the body, but it produces an effect within the body.

Detailed explanation-3: -external stimulus (plural external stimuli) A signal (stimulus) that originates from outside an organism.

Detailed explanation-4: -The plural of stimulus is stimuli. Stimuli can be external or internal. An example of external stimuli is your body responding to a medicine. An example of internal stimuli is your vital signs changing due to a change in the body.

Detailed explanation-5: -External stimulus. The external stimulus includes touch and pain, vision, smell, taste, sound, and balance (equilibrium).